Bohr Model Cards/ Practice

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Sample Instructional Approaches:
1. Layout the models in the shape of the periodic table to discover trends
Students should notice:  Protons and Neutrons in the middle - Nucleus  Electrons on the outside – Electron cloud  Trend of increasing protons across a period  Protons and Neutrons sometimes match, but not always  Number of protons equals the number of electrons  Valence electrons are the electrons on the outermost ring
2. Have the students look at the cards next to a periodic table and make predictions  Have the students predict what determines the atomic number.  Have the students predict how the atomic mass was determined.
3. Use the models to match the name with the correct model.
4. Project a model on the board and have students write the name on white boards.
5. Project a name on the board and have the students find the correct model.
6. Project a model on the board and have the students write which group/period the element should be located.
7. Project models from group 1 and group 18 on the board and have the students determine the element’s reactivity.